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防 爬 : 73 phrases in 10 subjects |
| Architecture | 5 |
| Bridge construction | 5 |
| Electric machinery | 3 |
| Electronics | 2 |
| General | 6 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Rail transport | 7 |
| Steel production | 1 |
| Technology | 40 |
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